Lighting troubles:

ok So I'm trying to sset up lighting for a dark cave, I've followed a few posts and watched a few videos, my Problem is that two of my Characters have Darkvision of 60ft and two don't, so when I set up the Characters with their Darkvsion it also gives it to my other two players, also the players who have darkvision when I press Ctrl+L I can see that player's token but when I do it for the players without Darkvision their token disappears, I have a game at 8PM PDT and I've been trying to fix this and figure it out for three days, can someone Please help me out??? Thanks in advance.

To give the other players darkvision, are you setting the "Emits Light" radius in their token settings? If so, make sure you do no check the box that says "All players see light".

No I haven't checked the Emits light radius I figured that made the token give off light

and only the darkvision players tokens have the "has sight" box checked

"Has sight" alone won't give them darkvision (I don't think), I think you have to pretend the dark vision is light emitted from the token. "Has sight" should just make their token visible when dynamic lighting is enabled. Which probably solves your other problem btw, all of your characters should have that box checked.